Scooterotica

johnny rotten

The packer is used with a standard stroke to raise the port timings If I'm not mistaken he does a long stroke (60 mm) version as well. Does anyone know what's involved there regarding packers or recessed heads etc. SF The packer and recessed head are only for the standard 57mm stroke crank from wha...

johnny rotten

I had this occur on a 24 Si carb when the fuel tap was switched off and the tank was full...it turned out to be fuel by passes the off position on a sip fast flow fuel tap when the fuel level is above the breather pipe...I resolved it replacing the tap with one that doesn't have a breather from chis...

johnny rotten

Not very often when you weigh 22 Clem... lol!

johnny rotten

My HB stage4 207 was able to get up to the 80mph mark on the Speedo (I realise that's not a true 80mph I'm just trying to give an idea of how mine performed) which I was quite cuffed with as I weighed 22clem at the time

johnny rotten

SIP suggest going 5-10% larger n drilling the air filter I've got a 4mm hole over the main jet...hope that helps

johnny rotten

Ive no plans for taking the barrel off at the moment Jack as i was just enquiring about what possible options where available for long stroking that setup if i remember on next time i take it off i'll drop you a line however i do know that the packer is 1.5mm thick

johnny rotten

I'm not sure Sean I'll try n find out for you

johnny rotten

Thanks for the offer jack...I spoke to HB again n he said that raising the stage 4 207 barrel wouldn't work with a long stroke crank as it would just throw all the port timings out of sinc n just kill off the bottom end so looks like the lowered barrel n modified head is the only option

johnny rotten

Where do you place your packer plate(s) jack?..I spoke to HB about it n he mentioned removing the packer from the base of the barrel where it currently is with the 57mm crank set up n getting the head machined to suit.

johnny rotten

Would there be any benefit to putting a 60mm crank on one of these set ups?
Has it been done?
Would it just mean fitting an extra 1.5mm packer plate at the base of the barrel?

Cheers

John

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